I found the stool test difficult to carry out and I'm not sure I got enough in the sample tube with the spoon-lid, what do I do?

If you're not sure you filled the sample tube with the spoon-lid properly, check if you filled it to the maximum line.

As long as you filled the tube with the spoon-lid to the maximum line, it should be fine. You can use separate stools if you were only able to fill it part of the way.

The reason we need enough sample to fill the tube to the maximum line is because we need enough material for different departments at the lab and some markers need more stool for testing than others.

If the sample is well below the fill line, you can add more stool. If needed, you can store the sample tube in the fridge overnight and add to it the next day before sending it off.